, romney said that because of obama, the iranians are four years closer to nuclear weapons that is hogwash. >> think of what we have done to the iranian regime, to slow them down, not just the sanctions but the shadow war and cyber attacks, clea clearly we are slg them and that matters and also has the potential for the iron jabs to do something back. >> rose: the lance armstrong story with coyle, macur and david epstein and sally jenkins. >> plus ian bremmer on the international risks for 2013 when we continue. >> funding for charlie rose was provided by the following. mye-e captioning sponsored by rose communications from our studios in new york city, this is charlie rose. >> rose: lance armstrong by any measure was widely known as the king of cycling but the career of this seven-time tour de france winner has been marred in controversy, last year the u.s. anti-doping agency accused him of running the most sophisticated doping program in history, armstrong denied the allegations for over a decade, he admitted to using performance-enhancing drugs in an interview recorded with oprah winfre